ST72314J4B7(2003) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72314J4B7
(Rev.:2003)

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES

STMicroelectronics 

ST72334J/N, ST72314J/N, ST72124J

INTERRUPTS (Cont’d)

Figure 18. Interrupt Processing Flowchart

FROM RESET

N

I BIT SET?

Y

FETCH NEXT INSTRUCTION

N

INTERRUPT

PENDING?

Y

N

EXECUTE INSTRUCTION

IRET?

Y

STACK PC, X, A, CC

SET I BIT

LOAD PC FROM INTERRUPT VECTOR

RESTORE PC, X, A, CC FROM STACK

THIS CLEARS I BIT BY DEFAULT

Table 5. Interrupt mapping

N°

Source

Block

Description

RESET Reset

TRAP

Software Interrupt

0

Not used

1

MCC/RTC Main Clock Controller Time Base Interrupt

CSS

or Clock Security System Interrupt

2

ei0

External Interrupt Port A3..0

3

ei1

External Interrupt Port F2..0

4

ei2

External Interrupt Port B3..0

5

ei3

External Interrupt Port B7..4

6

Not used

7

SPI

SPI Peripheral Interrupts

8

TIMER A TIMER A Peripheral Interrupts

9

TIMER B TIMER B Peripheral Interrupts

10

SCI

SCI Peripheral Interrupts

11 Data-EEPROM Data EEPROM Interrupt

12

Not used

13

Register

Label

N/A

MCCSR

CRSR

N/A

SPISR

TASR

TBSR

SCISR

EECSR

Priority

Order

Exit

from

HALT1)

Highest yes

Priority no

yes

no

Lowest

Priority

Address

Vector

FFFEh-FFFFh

FFFCh-FFFDh

FFFAh-FFFBh

FFF8h-FFF9h

FFF6h-FFF7h

FFF4h-FFF5h

FFF2h-FFF3h

FFF0h-FFF1h

FFEEh-FFEFh

FFECh-FFEDh

FFEAh-FFEBh

FFE8h-FFE9h

FFE6h-FFE7h

FFE4h-FFE5h

FFE2h-FFE3h

FFE0h-FFE1h

Note 1. Valid for HALT and ACTIVE-HALT modes except for the MCC/RTC or CSS interrupt source which exits from

ACTIVE-HALT mode only.

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